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Am J Hum Genet. 2012 Nov 2;91(5):950-7. doi: 10.1016/j.ajhg.2012.10.002. Epub 2012 Oct 25.

In-frame mutations in exon 1 of SKI cause dominant Shprintzen-Goldberg syndrome.

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  • 1Equipe d'Accueil 4271, Equipe Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France.

Abstract

Shprintzen-Goldberg syndrome (SGS) is characterized by severe marfanoid habitus, intellectual disability, camptodactyly, typical facial dysmorphism, and craniosynostosis. Using family-based exome sequencing, we identified a dominantly inherited heterozygous in-frame deletion in exon 1 of SKI. Direct sequencing of SKI further identified one overlapping heterozygous in-frame deletion and ten heterozygous missense mutations affecting recurrent residues in 18 of the 19 individuals screened for SGS; these individuals included one family affected by somatic mosaicism. All mutations were located in a restricted area of exon 1, within the R-SMAD binding domain of SKI. No mutation was found in a cohort of 11 individuals with other marfanoid-craniosynostosis phenotypes. The interaction between SKI and Smad2/3 and Smad 4 regulates TGF-β signaling, and the pattern of anomalies in Ski-deficient mice corresponds to the clinical manifestations of SGS. These findings define SGS as a member of the family of diseases associated with the TGF-β-signaling pathway.

Copyright © 2012 The American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.

PMID:
23103230
[PubMed - indexed for MEDLINE]
PMCID:
PMC3487125
Free PMC Article

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